// @(#)TCPTrace.java   9/2002
// Copyright (c) 1998-2002, Distributed Real-time Computing Lab (DRCL) 
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// 
// 1. Redistributions of source code must retain the above copyright notice,
//    this list of conditions and the following disclaimer. 
// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution. 
// 3. Neither the name of "DRCL" nor the names of its contributors may be used
//    to endorse or promote products derived from this software without specific
//    prior written permission. 
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// 

package drcl.net.traffic;

import java.io.Reader;
import java.io.*;
import drcl.comp.*;
import drcl.data.*;

/**
 */
public class TCPTrace extends TraceInput
{
  public TCPTrace()
  { super(); }

  public TCPTrace(String id_)
  { super(id_); }

  BufferedReader breader;

  long src_id;
  long dest_id;
  int  src_port;
  int  dest_port;
  
  public void setParam(long src, long dest, int s_port, int d_port)
  {
    src_id    = src;
    dest_id    = dest;
    src_port  = s_port;
    dest_port  = d_port;
  }
  
  protected double setNextPacket(drcl.net.FooPacket nextpkt_) 
  {
    double  time_;
    int  size_;
    
    try{
      if (breader == null)
        breader = reader instanceof BufferedReader?
          (BufferedReader)reader: new BufferedReader(reader);
      do {
        String line;
        if ((line = breader.readLine()) == null) return Double.NaN;
        java.util.StringTokenizer st = new java.util.StringTokenizer(line);
        String element [] = new String[6];
        int i;
        for(i=0; i<6; i++)
          if (st.hasMoreTokens())
            element[i] = st.nextToken();
        if(i!=6) return Double.NaN;
        time_  = Double.valueOf(element[0]).doubleValue();
        long s_host  = Long.valueOf(element[1]).longValue();
        long d_host  = Long.valueOf(element[2]).longValue();
        long s_port  = Long.valueOf(element[3]).longValue();
        long d_port  = Long.valueOf(element[4]).longValue();
        size_  = Integer.parseInt(element[5]);
        if( (s_host==src_id) && (d_host==dest_id) && (s_port==src_port) && (d_port==dest_port))
          break;
      }while(true);
      nextpkt_.setPacketSize(size_);
      return time_;
    }
    catch (Exception e_) {
      e_.printStackTrace();
      return Double.NaN;
    }
  }
  
  public void reset()
  {
    super.reset();
/*    try {
      if (reader != null) reader.reset();
    }
    catch (Exception e_) {
      drcl.Debug.error(this, "reset()| reader cannot be reset");
    }
*/
  }
  
  public void duplicate(Object source_)
  {
    super.duplicate(source_);
    TraceInput that_ = (TraceInput) source_;
  }
  
  public String info()
  { return super.info(); }
}
